The monolayer of black phosphorous, or phosphorene, has recently emerged as a
new 2D semiconductor with intriguing highly anisotropic transport properties.
Existing calculations of its intrinsic phonon-limited electronic transport
properties so far rely on the deformation potential approximation, which is in
general not directly applicable to anisotropic materials since the deformation
along one specific direction can scatter electrons traveling in all directions.
We perform a first-principles calculation of the electron-phonon interaction in
phosphorene based on density functional perturbation theory and Wannier
interpolation. Our calculation reveals that 1) the high anisotropy provides
extra phase space for electron-phonon scattering, and 2) optical phonons have
appreciable contributions. Both effects cannot be captured by the deformation
potential calculations.Comment: 25 pages, 15 figure
